Modern, "can't pay" (4)
Flying
Other nonblack creatures you control get +1/+1.
Players can't pay life or sacrifice creatures to cast spells or activate abilities.
Karn's Sylex enters tapped.
Players can't pay life to cast spells or to activate abilities that aren't mana abilities.
, , Exile Karn's Sylex: Destroy each nonland permanent with mana value X or less. Activate only as a sorcery.
Your life total can't change. (You can't gain or lose life. You can't pay any amount of life except 0.)
When Yasharn enters, search your library for a basic Forest card and a basic Plains card, reveal those cards, put them into your hand, then shuffle.
Players can't pay life or sacrifice nonland permanents to cast spells or activate abilities.
Gatherer works better in the Companion app!